励磁系统PT一次保险慢熔判别技术  

Identifying Technology of PT High Voltage Side Fuse Slow Melting for Excitation System

作　　者：李雅琪 LI Yaqi(Datang Central South Electric Power Test and Research Institute,Zhengzhou 450000,China)

机构地区：[1]中国大唐集团科学技术研究院有限公司中南电力试验研究院,河南郑州450000

出　　处：《电工技术》2021年第18期153-154,159,共3页Electric Engineering

摘　　要：近年来发生多起因发电机机端PT一次保险慢熔导致励磁系统误强励,并引起发变组保护动作的事件,严重威胁机组的安全稳定运行。对现有励磁系统PT一次保险慢熔判别方法进行阐述和总结,比较各判别方法的优缺点,并对存在的问题进行分析。最后对未来的研究方向进行了展望。In recent years,a number of PT high voltage side fuse slow melting accident has occurred,which leads to the excitation system falsely raise excitation.As a result,protection action event has been caused in the generator transformer unit,which severely threatens the safe and stable operation of the generator.In this paper,the existed identifying methods of PT primary side fuse slow melting in excitation system are introduced and summarized,the advantages and disadvantages of each discrimination method are compared,and the existing problems are analyzed.Finally,the future research direction is prospected.

关 键 词：PT慢熔 机端电压比较 负序电压 励磁系统 

分 类 号：TM307[电气工程—电机]